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Message-ID: <bfe1681c-9515-5c3c-6f9a-276e60d3db52@ti.com>
Date: Wed, 12 Apr 2023 14:49:07 +0530
From: Md Danish Anwar <a0501179@...com>
To: Mathieu Poirier <mathieu.poirier@...aro.org>,
MD Danish Anwar <danishanwar@...com>
CC: "Andrew F. Davis" <afd@...com>, Suman Anna <s-anna@...com>,
Roger Quadros <rogerq@...nel.org>,
Vignesh Raghavendra <vigneshr@...com>,
Tero Kristo <kristo@...nel.org>,
Bjorn Andersson <andersson@...nel.org>,
Santosh Shilimkar <ssantosh@...nel.org>,
Nishanth Menon <nm@...com>, <linux-remoteproc@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>, <linux-omap@...r.kernel.org>,
<srk@...com>, <devicetree@...r.kernel.org>,
<netdev@...r.kernel.org>
Subject: Re: [EXTERNAL] Re: [PATCH v7 4/4] soc: ti: pruss: Add helper
functions to set GPI mode, MII_RT_event and XFR
On 11/04/23 23:27, Mathieu Poirier wrote:
> On Tue, Apr 04, 2023 at 05:23:36PM +0530, MD Danish Anwar wrote:
>> From: Suman Anna <s-anna@...com>
>>
>> The PRUSS CFG module is represented as a syscon node and is currently
>> managed by the PRUSS platform driver. Add easy accessor functions to set
>> GPI mode, MII_RT event enable/disable and XFR (XIN XOUT) enable/disable
>> to enable the PRUSS Ethernet usecase. These functions reuse the generic
>> pruss_cfg_update() API function.
>>
>> Signed-off-by: Suman Anna <s-anna@...com>
>> Co-developed-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@...aro.org>
>> Signed-off-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@...aro.org>
>> Signed-off-by: Puranjay Mohan <p-mohan@...com>
>> Reviewed-by: Roger Quadros <rogerq@...nel.org>
>> Reviewed-by: Tony Lindgren <tony@...mide.com>
>> Signed-off-by: MD Danish Anwar <danishanwar@...com>
>> ---
>> drivers/remoteproc/pru_rproc.c | 15 -------
>> drivers/soc/ti/pruss.c | 74 ++++++++++++++++++++++++++++++++
>> include/linux/remoteproc/pruss.h | 51 ++++++++++++++++++++++
>> 3 files changed, 125 insertions(+), 15 deletions(-)
>>
>> diff --git a/drivers/remoteproc/pru_rproc.c b/drivers/remoteproc/pru_rproc.c
>> index 4ddd5854d56e..a88861737dec 100644
>> --- a/drivers/remoteproc/pru_rproc.c
>> +++ b/drivers/remoteproc/pru_rproc.c
>> @@ -81,21 +81,6 @@ enum pru_iomem {
>> PRU_IOMEM_MAX,
>> };
>>
>> -/**
>> - * enum pru_type - PRU core type identifier
>> - *
>> - * @PRU_TYPE_PRU: Programmable Real-time Unit
>> - * @PRU_TYPE_RTU: Auxiliary Programmable Real-Time Unit
>> - * @PRU_TYPE_TX_PRU: Transmit Programmable Real-Time Unit
>> - * @PRU_TYPE_MAX: just keep this one at the end
>> - */
>> -enum pru_type {
>> - PRU_TYPE_PRU = 0,
>> - PRU_TYPE_RTU,
>> - PRU_TYPE_TX_PRU,
>> - PRU_TYPE_MAX,
>> -};
>> -
>> /**
>> * struct pru_private_data - device data for a PRU core
>> * @type: type of the PRU core (PRU, RTU, Tx_PRU)
>> diff --git a/drivers/soc/ti/pruss.c b/drivers/soc/ti/pruss.c
>> index 0e37fe142615..64a1880ba4ee 100644
>> --- a/drivers/soc/ti/pruss.c
>> +++ b/drivers/soc/ti/pruss.c
>> @@ -213,6 +213,80 @@ int pruss_cfg_set_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 mux)
>> }
>> EXPORT_SYMBOL_GPL(pruss_cfg_set_gpmux);
>>
>> +/**
>> + * pruss_cfg_gpimode() - set the GPI mode of the PRU
>> + * @pruss: the pruss instance handle
>> + * @pru_id: id of the PRU core within the PRUSS
>> + * @mode: GPI mode to set
>> + *
>> + * Sets the GPI mode for a given PRU by programming the
>> + * corresponding PRUSS_CFG_GPCFGx register
>> + *
>> + * Return: 0 on success, or an error code otherwise
>> + */
>> +int pruss_cfg_gpimode(struct pruss *pruss, enum pruss_pru_id pru_id,
>> + enum pruss_gpi_mode mode)
>> +{
>> + if (pru_id < 0 || pru_id >= PRUSS_NUM_PRUS)
>> + return -EINVAL;
>> +
>> + if (mode < 0 || mode > PRUSS_GPI_MODE_MAX)
>> + return -EINVAL;
>> +
>> + return pruss_cfg_update(pruss, PRUSS_CFG_GPCFG(pru_id),
>> + PRUSS_GPCFG_PRU_GPI_MODE_MASK,
>> + mode << PRUSS_GPCFG_PRU_GPI_MODE_SHIFT);
>> +}
>> +EXPORT_SYMBOL_GPL(pruss_cfg_gpimode);
>> +
>> +/**
>> + * pruss_cfg_miirt_enable() - Enable/disable MII RT Events
>> + * @pruss: the pruss instance
>> + * @enable: enable/disable
>> + *
>> + * Enable/disable the MII RT Events for the PRUSS.
>> + *
>> + * Return: 0 on success, or an error code otherwise
>> + */
>> +int pruss_cfg_miirt_enable(struct pruss *pruss, bool enable)
>> +{
>> + u32 set = enable ? PRUSS_MII_RT_EVENT_EN : 0;
>> +
>> + return pruss_cfg_update(pruss, PRUSS_CFG_MII_RT,
>> + PRUSS_MII_RT_EVENT_EN, set);
>> +}
>> +EXPORT_SYMBOL_GPL(pruss_cfg_miirt_enable);
>> +
>> +/**
>> + * pruss_cfg_xfr_enable() - Enable/disable XIN XOUT shift functionality
>> + * @pruss: the pruss instance
>> + * @pru_type: PRU core type identifier
>> + * @enable: enable/disable
>> + *
>> + * Return: 0 on success, or an error code otherwise
>> + */
>> +int pruss_cfg_xfr_enable(struct pruss *pruss, enum pru_type pru_type,
>> + bool enable)
>> +{
>> + u32 mask, set;
>> +
>> + switch (pru_type) {
>> + case PRU_TYPE_PRU:
>> + mask = PRUSS_SPP_XFER_SHIFT_EN;
>> + break;
>> + case PRU_TYPE_RTU:
>> + mask = PRUSS_SPP_RTU_XFR_SHIFT_EN;
>> + break;
>> + default:
>> + return -EINVAL;
>> + }
>> +
>> + set = enable ? mask : 0;
>> +
>> + return pruss_cfg_update(pruss, PRUSS_CFG_SPP, mask, set);
>> +}
>> +EXPORT_SYMBOL_GPL(pruss_cfg_xfr_enable);
>> +
>> static void pruss_of_free_clk_provider(void *data)
>> {
>> struct device_node *clk_mux_np = data;
>> diff --git a/include/linux/remoteproc/pruss.h b/include/linux/remoteproc/pruss.h
>> index 5641153459a7..b68ab8735247 100644
>> --- a/include/linux/remoteproc/pruss.h
>> +++ b/include/linux/remoteproc/pruss.h
>> @@ -34,6 +34,33 @@ enum pruss_gp_mux_sel {
>> PRUSS_GP_MUX_SEL_MAX,
>> };
>>
>> +/*
>> + * enum pruss_gpi_mode - PRUSS GPI configuration modes, used
>> + * to program the PRUSS_GPCFG0/1 registers
>> + */
>> +enum pruss_gpi_mode {
>> + PRUSS_GPI_MODE_DIRECT = 0,
>> + PRUSS_GPI_MODE_PARALLEL,
>> + PRUSS_GPI_MODE_28BIT_SHIFT,
>> + PRUSS_GPI_MODE_MII,
>> + PRUSS_GPI_MODE_MAX,
>> +};
>> +
>> +/**
>> + * enum pru_type - PRU core type identifier
>> + *
>> + * @PRU_TYPE_PRU: Programmable Real-time Unit
>> + * @PRU_TYPE_RTU: Auxiliary Programmable Real-Time Unit
>> + * @PRU_TYPE_TX_PRU: Transmit Programmable Real-Time Unit
>> + * @PRU_TYPE_MAX: just keep this one at the end
>> + */
>> +enum pru_type {
>> + PRU_TYPE_PRU = 0,
>> + PRU_TYPE_RTU,
>> + PRU_TYPE_TX_PRU,
>> + PRU_TYPE_MAX,
>> +};
>> +
>
> These go in pruss_driver.h
>
>> /**
>> * enum pruss_pru_id - PRU core identifiers
>> * @PRUSS_PRU0: PRU Core 0.
>> @@ -98,6 +125,11 @@ int pruss_release_mem_region(struct pruss *pruss,
>> struct pruss_mem_region *region);
>> int pruss_cfg_get_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 *mux);
>> int pruss_cfg_set_gpmux(struct pruss *pruss, enum pruss_pru_id pru_id, u8 mux);
>> +int pruss_cfg_gpimode(struct pruss *pruss, enum pruss_pru_id pru_id,
>> + enum pruss_gpi_mode mode);
>> +int pruss_cfg_miirt_enable(struct pruss *pruss, bool enable);
>> +int pruss_cfg_xfr_enable(struct pruss *pruss, enum pru_type pru_type,
>> + bool enable);
>>
>> #else
>>
>> @@ -133,6 +165,25 @@ static inline int pruss_cfg_set_gpmux(struct pruss *pruss,
>> return ERR_PTR(-EOPNOTSUPP);
>> }
>>
>> +static inline int pruss_cfg_gpimode(struct pruss *pruss,
>> + enum pruss_pru_id pru_id,
>> + enum pruss_gpi_mode mode)
>> +{
>> + return ERR_PTR(-EOPNOTSUPP);
>> +}
>> +
>> +static inline int pruss_cfg_miirt_enable(struct pruss *pruss, bool enable)
>> +{
>> + return ERR_PTR(-EOPNOTSUPP);
>> +}
>> +
>> +static inline int pruss_cfg_xfr_enable(struct pruss *pruss,
>> + enum pru_type pru_type,
>> + bool enable);
>> +{
>> + return ERR_PTR(-EOPNOTSUPP);
>> +}
>> +
>
> So do these.
>
> Thanks,
> Mathieu
>
Sure, Mathieu. I'll move all these definitions and enums to
linux/pruss_driver.h from linux/remoteproc/pruss.h accordingly and send next
revision.
>> #endif /* CONFIG_TI_PRUSS */
>>
>> #if IS_ENABLED(CONFIG_PRU_REMOTEPROC)
>> --
>> 2.25.1
>>
--
Thanks and Regards,
Danish.
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